高水速凝材料浆体流变特性研究

高水速材料是一种新型无机材料，其体积比合水率达９０％，称为“点水成石”。高水材料加水制成净浆可用于煤矿巷旁充填和灌注：高水材料具有不同于水泥的团结特性，可团结粘土、污泥和矿山尾砂等工业废料，高水材料与上述骨料加水后制成砂浆，输送浓度为６０～７５％，具有良好的流动性和输送性。在此重点介绍高水材料浆体的流变特性研究的成果，包括高水材料浆体的类型、流变特性、屈服应力、结构粘度与浆体浓度的关系，以及高水材料浆体的输送特性和管道阻力的计算公式，以便更好的推广和广泛使用。     

Effects of Vehicle Impact Velocity and Front-End Structure on Dynamic Responses of Child Pedestrians

To investigate the effects of vehicle impact velocity and front-end structure on the dynamic responses of child pedestrians, an extensive parametric study was carried out using two child mathematical models at 6 and 15 years old. The effect of the vehicle impact velocity was studied at 30, 40, and 50 km/h in terms of the head linear velocity, impact angle, and head angular velocity as well as various injury parameters concerning the head, chest, pelvis, and lower extremities. The variation of vehicle front-end shape was determined according to the shape corridors of modern vehicles, while the stiffness characteristics of the bumper, hood edge, and hood were varied within stiffness corridors obtained from dynamic component tests. The simulation results show that the vehicle impact speed is of great importance on the kinematics and resulting injury severity of child pedestrians. A significant reduction in all injury parameters can be achieved as the vehicle impact speed decreases to 30 km/h. The head and lower extremities of children are at higher injury risks than other body regions. Older children are exposed to higher injury risks to the head and lower leg, whereas younger ones sustain more severe impact loads to the pelvis and upper leg. The results from factorial analysis indicate that the hood-edge height has a significant effect on the kinematics and head impact responses of children. A higher hood edge could reduce the severity of head impact for younger children, but aggravate the risks of head injury for older ones. A significant interaction exists between the bumper height and the hood-edge height on the head impact responses of younger child. Nevertheless, improving the energy absorption performance of the hood seems effective for mitigating the severity of head injuries for children.     

WBS-RBS与AHP方法在土建工程施工安全风险评估中的应用

结合土建工程施工安全风险管理的特点,提出了WBS-RBS与AHP相结合的土建工程施工安全风险评估方法,把评估过程分为工程项目资料调研、风险辨识、风险衡量和风险度计算4个步骤,并详细介绍了WBS-RBS风险辨识方法、专家调查风险衡量方法和AHP风险度计算方法在土建工程施工安全风险评估中的应用。WBS-RBS与AHP相结合的土建工程施工安全风险评估方法在系统分析计算的基础上,能够全面的辨识土建工程项目施工安全的典型风险和计算总的风险度,为工程项目的施工安全风险评价提供了一个可行的方法和为有效防范风险奠定了基础。     

磨料水射流切割与其它方法切割对金相组织影响的试验研究

本文以２０＃优质碳素结构钢为试件，介绍了磨料水射流切割与其它方法切割对金相组织影响的试验。试验结果表明，磨料水射流切割无热影响区。     

辽宁省产业结构对环境影响的初探

产业结构影响着一个地区社会经济以及环境等诸多方面。本文对辽宁省产业结构现状,主要行业产值及污染贡献率,以及产业结构调整对污染物排放强度变化影响进行剖析,较系统地分析了一个地区的产业结构对环境的影响,对环境管理及经济建设具有一定的借鉴意义。     

Brood neglect and contingent foraging behavior in a pelagic seabird

Among species where there is a risk to leaving offspring unattended, parents usually take alternating shifts guarding their young. However, they may occasionally exhibit brood neglect by leaving their offspring unattended at the nest. To investigate this phenomenon further, we examined the foraging behavior of the northern gannet (Morus bassanus) during chick-rearing. This species has a prolonged nestling period (13 weeks) and the single chick is usually guarded by one or other of its parents, because unattended chicks are frequently attacked by conspecifics. We tested the prediction that the foraging behavior of adults when they left their offspring alone at the nest (unattended trips) would differ in character to when adults left offspring with their partner (attended trips). Brood neglect typically occurred after a longer-than-average attendance period at the nest. Unattended trips were, on average, about half the duration of attended trips, and therefore much closer to the colony. There was also a difference in departure direction between attended and unattended trips, with unattended trips tending to be northeast of the colony. Chicks were fed by parents after both attended and unattended trips, but the frequency and the duration of unattended trips increased as chicks grew older whereas the duration of attended trips decreased as chicks grew. These results indicate that parents may be making a trade-off between risk of attack to their offspring and food-intake rate, and that the solution to this trade-off is dependent on chick age.Communicated by C. Brown     

软管隔振结构在噪声控制中应用的研讨

由膜和板自由振动的理论分析，可以证明布质或软橡胶质制造的连接管比普通金属刚性管隔振降噪效果提高10-20dB以上。但在设计手册及现有的书刊中未见有量化设计和运用技巧方面的介绍。软连接一般存在透声问题．只要合理运用也可化害为利。这取决于对安装位置和尺量的合理选择。当选择利用其透声时，管长L应不小于管径d；如需避免其透声时，应取L≤d／4。     

环境保护图书网络管理系统的开发及应用

在多年环保图书管理工作的基础上，自主研发了一套图书网络管理系统，该系统基于ASP VBScript语言开发，采用B／S结构设计模型，适合于中小型企事业单位局域网的图书自动化管理。     

钠钙双碱法烟气脱硫主要影响因素的实验研究

采用纤维栅洗涤器在实验室对钠钙双碱法烟气脱硫效率的主要影响因素 :洗涤器的风速、烟气SO2 初始浓度、吸收液 p H值及 [Na+ ]浓度、液气比等进行了模拟实验 ,得出了它们与烟气脱硫效率的关系。     

双柱双ECD检测器气相色谱仪测定有机氯农药方法的研究

采用Angilent 6890N双柱双ECD检测器气相色谱仪,色谱条件为:柱1 DB-1701 30m×0.53rnm×0.83μm,柱2 DB-608 30m×0.53mm×1μm,柱温范围为150.0～270.0℃,2柱分别为5.0mL/min载气(N_2)流量,60.0mL/min尾吹气流量,采用不分流模式,建立了测定有机氯农药的分析方法。在此色谱条件下得到了较好的组分分离,2根柱可分离20个有机氯农药化合物及2个示踪剂,被分离化合物具有良好的线性(r>0.99).较好的精密度(C.V%0.47～5.21)和准确度。由于采用了双柱双ECD检测器,故该方法具有定性更准确、定量更精确的特点。同时,对各组分和示踪剂的回收率及最小检出浓度进行了研究并得到了满意的结果,对实际水样进行了测试。